that is what drives us. see your authorized mercedes-benz dealer for exceptional offers on the c-class. ♪ [ male announcer ] every siness day, bank of america lends billions of dollars, to individuals, institutions, schools, organizations and businesses. ♪ working to set opportunity in motion. bank of america. >> shepard: an indiana teenager who admits he strangled his own 10-year-old brother wanted to be just like the serial killer he had seen on tv. so says his former girlfriend. she testified in court today that before last november's murder this young man conley tried to talk to her about the title character in the fictional show time series dexter. just one more disturbing development in a very sad case of a now 18-year-old boy who claimed he was sexually abused repeatedly attempted suicide and who confessed to investigators that he rarely feels any emotions. he also explained on video how he killed his brother conner. knocking him unconscious with a head lock. then dragging him into the kitchen. >>